Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Interest income
Loans and leases	$ 210,862	$ 161,034
Investment securities:
Total investment securities interest and dividend income	19,310	11,748
Overnight investments	1,338	612
Total interest income	231,510	173,394
Interest expense
Deposits	5,629	6,825
Short-term borrowings	1,934	585
Long-term obligations	3,782	5,053
Total interest expense	11,345	12,463
Net interest income	220,165	160,931
Provision (credit) for loan and lease losses	5,792	(1,903)
Net interest income after provision for loan and lease losses	214,373	162,834
Noninterest income
Gain on acquisition	37,555	0
Cardholder services	18,401	11,832
Merchant services	18,880	13,521
Service charges on deposit accounts	22,058	14,440
Wealth management services	20,880	14,880
Fees and Commissions, Correspondent Clearing	50	4,861
Securities gains (losses)	5,126	0
Other service charges and fees	5,455	3,944
Mortgage income	4,549	955
Insurance commissions	3,297	3,287
ATM income	1,664	1,202
Adjustments for FDIC receivable for loss share agreements	(1,047)	(12,349)
Other	8,510	5,741
Total noninterest income	145,378	62,314
Noninterest expense
Salaries and wages	106,543	79,353
Employee benefits	30,146	20,100
Occupancy expense	25,620	20,410
Equipment expense	23,541	18,773
FDIC insurance expense	4,271	2,636
Foreclosure-related expenses	2,557	5,410
Merger-related expenses	2,997	2,453
Other	62,585	41,895
Total noninterest expense	258,260	191,030
Income before income taxes	101,491	34,118
Income taxes	37,675	11,639
Net income	$ 63,816	$ 22,479
Average shares outstanding (in shares)	12,010,405	9,618,941
Net income per share	$ 5.31	$ 2.34